High-strength lock



FIG. 1 is a front right perspective view of a high-strength lock showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a right side elevation view thereof, the left side being a mirror image thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a rear view thereof; and,

FIG. 7 is a cross section at the line 7-7 in FIG. 4.

The broken lines in FIGS. 1, 2, 4, 5, and 7 depict environment, and the elements shown in broken lines form no part of the claimed design. 

CLAIM The ornamental design for a high-strength lock, as shown and described. 